The DYNAFIT Thermo Race Bottle is a light, BPA-free bottle and a super practical accessory for races and training. The time-tested Jet Valve™ mouthpiece is leakproof and self-sealing. With the DYNAFIT Thermo Race Bottle you can keep your fluids safe and secure at hand on a tour. The insulation keeps water, sports drinks and other fluids from freezing on very cold days.